Twin cylinder engine



Sept. 27, 1938. c. MONTl 2,131,595

TWIN CYLINDER ENGINE Filed Oct. 29, 1957- INVENTOR Patented Sept. 27, 1938 entree stares eA'raNT OFFICE 1 Claim.

This invention relates to new and useful improvements in a twin cylinder engine.

The invention has for an object the arrangement of the cylinders of an engine in a particu- 5 lar manner.

More specifically, it is contemplated to arrange them in pairs, the cylinders of each pair being radially distanced 180 from each other.

Still further the invention proposes to utilize a conventional crankshaft with a plurality of crank and of the objects and advantages thereof, ref- 25 erence will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a mate- 30 rial part of this disclosure:-

Fig. 1 is a transverse sectional view of a twin cylinder engine constructed according to this invention, with schematic ignition wiring applied thereto.

35 Fig. 2 is a transverse. sectional view of the engine shown with a pair of the pistons in the suction position.

Fig. 3 is a view similar to Fig. 2 but showing the.

pistons in the compression position. Fig. 4 is another view similar to Fig. 2, but illustrating the power stroke.

Fig. 5 is another view similar to Fig. 2 but illustrating the exhaust.

Fig. 6 is a sectional view similar to Fig. 2 but of 4.5 a modified engine, vertical type.

Fig. '7 is a sectional view of another engine constructed according to this invention.

Fig. 8 is a fragmentary sectional view of a portion of the crank shaft and connecting rods of a 50 modified form of invention.

Fig. 9 is a sectional view taken on. the line 9-9 of Fig. 8.

The twin cylinder engine, according to this invention, is provided with a plurality of pairs of 55 cylinders m m H H l2 I2 I3 and I9.

The cylinders of each pair are arranged radially distanced 180 from each other. A crank shaft M is provided with a plurality of cranks M Connecting rods l5 connect together the pistons of each pair of the cylinders with different ones 5 of the said crank elements M The particular engine illustrated inFig. 1 is an 8 cylinder engine, but this is merely-for illustrative purposes as the invention'may be applied to different numbers of cylinders. 5

In Fig. 1 a preferred wiring for the engine is disclosed. A distributor I6 is connected with a circuit H for controlling the ignition of cylinder w and I2 A circuit I8 controls cylinder l2 and l A circuit l9 controls cylinder I? and M A circuit controls cylinder H and l3 Sectional view Fig. 2 illustrates a section through two of the cylinders which fire simultaneously. These cylinders are in the suction positions. In Fig. 3 the crank shaft is shown turned 20 to a position in which compression is taking place. In Fig. 4 we have the explosion stroke, and in Fig.

5, the exhaust.

The enginev illustrated in Figs. 1-5 inclusive is one in which the cylinders are arranged horizontally.

In Fig. 6 a modification of the invention is shown in which there is a vertical sectional view of an identical engine to that previously described, except positioned with the cylinders vertically. It should be understood that the invention is applicable to horizontal, vertical, and all different angularly positioned engines.

In Fig. 7 another embodiment of the invention has been disclosed which distinguishes from the prior form merely in the construction of the crank shaft. The crank shaft I4 is provided with a plurality of cranks M and between each of these cranks there is a bearing 22. It is in this respect that Fig. 7 distinguishes from Fig. 1 0 in which there is a bearing 23 between the pairs of the rungs of the crank shaft.

In Figs. 8 and 9 a modification of the engine has been disclosed wherein there is an arrangement for controlling the degree of compression of the engine. This controlling means is associated, particularly, with the crank shaft and the connecting rods. There is a crank shaft I4" havin crank elements l4. Each of these crank elements is provided with an eccentric bushing 23. This eccentric bushing has an outer peripheral surface of true cylindrical form. The eccentricity is accomplished by the fact that the bore through which the crank element I l passes is arranged oif center. The eccentric bushing 23 is also provided with disc shaped end flanges 24 which are in face contact with the radial arm portions of the crank shaft. Set screws threadedly engage through the radial arm portions and the crank shaft and abut against the flange portions 24 for holding the eccentric bushing in rotative adjusted position; that is, fixed upon the crank element [4.

The connecting rods of each pair of cylinders are rotatively mounted adjacent each other on different ones of the eccentric bushings 23. On each bushing the connected rods are separated from each other by a washer 26.

The screw 25 may be loosened to free the eccentric bushing 23, which then may be turned on the crank element M for drawing in or extending the connecting rods mounted thereon. In this manner the compression of the cylinder to which the connecting rods are associated may be controlled. The compression compass may be increased or decreased. In this manner the characteristics of the engine may be varied and controlled.

The other details necessary to have an operative engine are not disclosed in this specification since they are well known to those skilled in the art. Specific reference is had to a lubricating system, a cooling system, a Valve system and all the other intricacies generally associated with an engine of the type illustrated, are well known.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claim.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:-

In an engine, a cylinder, a piston slidably supported in said cylinder, a connecting rod connected at one end to said piston, a crank element connected to the other end of said rod for turning said element when said piston moves in said cylinder, and means on said crank element capable of being adjusted for controlling the path of movement of said piston within said cylinder, so that the compression limit of said piston may be increased or decreased, as desired, comprising an eccentric bushing rotatively supported on said crank element and having the said end of said connecting rod rotatively supported thereon, and means for holding said bushing'against rotating on said crank element for holding it in adjusted positions, comprising outwardly extending flanges formed on the ends of said bushing, and set screws engaging through portions of said crank element and abutting said bushing.

CHARLES MONTI. 

